This and "Chemistry" are the only episodes of The New Batman Adventures to feature all four members of the Bat-team (not including Alfred) in the same place at the same time, though Nightwing appears out of costume on both occasions.

Two-Face's appearance actually has a double meaning for the new Robin's debut, as the story with him and Tim's father is a connection to Robin's unnamed half, Jason Todd; also, his fight with Robin after Tim was convinced that Batman would need him and came in the Robin suit is similar to Tim Drake's comic debut.

The Robin suit display is a clear reference to Jason Todd's memorial in mainstream comics, though Jason doesn't wear the suit himself until the DC Universe Animated Original Movie "Batman: Under the Red Hood" where the suit is put up in the memorial as it is here.

When Batgirl unfolds the paper we can clearly see that there is only one imprint of the key; however, having been folded up within the paper, it should be imprinted in two places, not one.

When Batgirl is trying to turn off the countdown, it shows us at 10 seconds left, and then again at 5 seconds, and it is five seconds in between them, but if you continue counting down, she would have pulled out the wires at 0 seconds, not 2 as indicated on the machine.